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What is the function of a Carey foster bridge?
A Carey-foster's bridge is a modified version of the meter bridge (wheatstone bridge or potentiometer). It can be used to find out the average resistance per unit length of the meter bridge wire and hence find out the unknown resistance. It is more accurate and more sensitive than a meter bridge.
Why using wheatstone bridge in transducer?
You use a transducer in a wheatstone bridge. The wheatstone bridge allows you to find an unknown resistance.
How do you measure resistance with angle of potentiometer?
get a protractor, find a way to set the pot to it, easy way to do that is drilling a hole in the center. now connect ur pot to a dmm and turn it at any angle to get the resistance there
What is the necessity for balancing wheatstone bridge?
just to find out our given unknown resistance value or to put it another way, To find the value of the unknown resistor attached.
What are the applications of comparing Emf of two cells with the help of potentiometer?
I think you are talking about it's internal resistance or it's ability to supply a current to a load without significant drop in voltage. Experiment to find EMF of unknown cell The 1 Metre scaled potentiometer is placed across a cell of known EMF and the 'jockey' or slider connected to one terminal of a galvanometer. The second cell is wired with similar polarity to the first cell and connected from the other side of the galvo to the common negative terminal of the two cells. The slider of the potentiometer is progressively moved up from zero until the galvo shows no current. The EMF of the unknown cell is now a direct proportion to the reading in cm read of the metre scale. Example If the known cell has EMF of 3 volts and the galvo balances at 50cm then the unknown cell has EMF of1.5Volts Dry cells used in flashlights have a fairly high internal resistance whereas a Lead acid car cell has a very low internal resistance allowing the starter motor to draw hundreds of Amperes without volt drop.
Half deflection method to find galvanometer resistance?
We can find it by using wheatstone bridge.
How do you find conductance using ohms law?
To find the conductance using ohms law,you take the inverse of the resistance(/R)
When a 12v battery is connected across an unknown resistor 2.5mA current flows in the circuit find the resistance of the resistor?
Using ohm's law v=IR but we need to find the Resistance so, in place of v write r R=V/I
How can you find the density of an unknown liquid?
To find the density of an unknown liquid, you can measure its mass using a scale and then measure its volume by using a graduated cylinder or displacement method. Divide the mass by the volume to calculate the density of the liquid.
What will you need to measure to find out which wire has the greatest resistance?
To find out which wire has the greatest resistance, you will need to measure the resistance of each wire using a multimeter. Connect the multimeter to each wire separately and record the resistance values displayed. The wire with the highest resistance value will have the greatest resistance.
How can you find out weight of an unknown object by using standard masses by scale or by ruler?
To find the weight of an unknown object using standard masses and a scale, you can use a balance scale. Place the unknown object on one side and add standard masses to the other side until the balance is achieved. The sum of the standard masses used will be equal to the weight of the unknown object. To find the weight of an unknown object using a ruler, you can use the concept of density. Measure the dimensions of the object to calculate its volume, then weigh the object to find its mass. Using the formula density = mass/volume, you can determine the weight of the object by multiplying its volume by the density of the material it's made of.
Describe how to find the hardness of unknown mineral?
Minerals are tested for hardness by performing a scratch test. The unknown mineral is scratched with another object that the hardness is known. For example, a unknown mineral may be scratched with a piece of metal to compare the resistance.
